A comparison of theoretical and experimental limiting slopes for the concentration dependence of thermoelectric powers in dilute aqueous hydrochloric acid and hydrobromic acid

Wilmarth, Phillip A.; Payton, Arthur D.

doi:10.1021/j150625a048

Cited by 3 publications

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“…The theoretical slope of a plot of the TEP (corrected by the mass-action term) vs. c ~12 is determined from the "fiveterm" theory (1)(2)(3). The initial TEP of a hydrogen-electrode thermocell containing aqueous HC1 may be written as Feo = 1/2 S~ -~e + (tc,-) (Q*Hc,/T) -~H § [1] In Eq.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

“…The direct terms and the transport-number term are fairly certain and are identical to those previously reported (4a). The slope contr_ibutions from the electrophoretic terms, (Q*'Hcl) e and (S'n+) ~, are given by (4b) (Q*'HCt) e = 1/2 (Arions)(AQ*~ ' [2] (S'H+) e = (rH+/2T)(hQ*~ ' [3] The factor (hQ*~ is the difference between infinitedilution limiting values of the individual ionic heats of transport for the hydrogen and the chloride ions. The factor (Ar~on,) represents the difference of Stokes' radii for the hydrogen and the chloride ions.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

“…(S'H+) e = (rH+/2T)(hQ*~ ' [3] The factor (hQ*~ is the difference between infinitedilution limiting values of the individual ionic heats of transport for the hydrogen and the chloride ions. The factor (Ar~on,) represents the difference of Stokes' radii for the hydrogen and the chloride ions.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

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A Further Comparison of Theoretical and Experimental Limiting Slopes for the Concentration Dependence of Thermoelectric Powers in Aqueous Hydrochloric Acid at 25° and 15°C

Payton

Eubanks

Feller

et al. 1990

J. Electrochem. Soc.

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Using hydrogen-electrode thermocells, the initial thermoelectric power (TEP) in aqueous HC1 solutions has been measured at mean temperatures of 25 ~ and 15~ from 0.001 to 1.1M. The TEPs at c < 0.01M have been plotted vs. c ~2 to determine infinite-dilution limiting slopes. These experimental slopes have been compared with theoretical slopes calculated from our "five-term" theory.Investigation of the concentration dependence of initial thermoelectric powers (TEP) for hydrogen-electrode thermoceUs with aqueous HC1 solutions has continued in this laboratory using improved apparatus. The TEPs have been measured at concentrations ranging from 0.001 to 1.1M, using a temperature difference of 10 K at mean temperatures of 25 ~ and 15~ The measured TEPs (corrected by the mass-action term) have been plotted vs. c ~. The experimental limiting slopes have been determined from runs with concentrations less than 0.01M.In the next section we describe the theoretical concentration dependence of the TEPs and calculate the theoretical limiting slopes based on the "five-term" theory developed in this laboratory. We continue with a description of the new experimental procedure and results, concluding with a comparison of theoretical and experimental limiting slopes.

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Section: Theoretical Considerationsmentioning

confidence: 99%

Section: Theoretical Considerationsmentioning

confidence: 99%

Section: Theoretical Considerationsmentioning

confidence: 99%

“…ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 134.129.120 3. Downloaded on 2015-06-11 to IP…”

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